Process of making printing-slugs.



I W. R. ALLEN.

PROCESS OF MAKING PRINTING SLUGS.

) APPLICATION FILED JUNE 18.1914. .1 1 gg gzn Patented Dec. 29, 1914.

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. a citizen of the ing is a full, clear, and exact reference being- UNITED STATES- WILLIAM R. ALLEN, 0F CLEVELAND, OHIO, ASSIGNOR T0 GRAPH COMPANY, OF CLEVELAND, OHIO,

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THE AMERICAN nomi- A CORPORATION or OHIO.-

FROCESS OF MAKING PRINTING-SLUG S.

Application filed June 18,

I 1 adapted to stand a short height-to-paper and of a form which may be readily mounted in grooved or slotted holders, as, for example, the multigraph drum, slotted type plates, etc.

application opposite The objects of the invention are to provide such a slug in a form which will be effective in service and which may be easily and cheaply manufactured, 7 a

The present application is concerned with the process of making a slug comprising forming a primary slug and thereafter treatingitin a peculiar manner to obtainthe finished product. The printing slug formed by this'process is claimed in my divisional No. 869,750, filed November 2,

The invention comprises broadly the casting of al, slug in a T- form and the submitting ofthe shank of the slug to pressure from sides to form protuberances on the sides of the shank some'distance below the head, and the butting-off of the'shank below these protuberances. The protuberances constitute, in effect, ribs onoppo-site sides of which are effective :to prevent its out of the groove or slotted holder.

ThlS invention is illustrated in the drawingshereof and is herinafter more fullydescribed and its essential characteristics are set out in the claims.

Inthe drawings, Figure 1 is a. section through a mold wheel, melting pot and matrix of a suitable casting machine-arranged .to cast a T-headed slug; F g. 2 is "a section through the mold wheel along thecasting slot showing the cast slugin position; Fig. 3

1s a perspective view of 'a portion of the-slug castby the mechanism shown in Figs.v 1 and 2; Fig. 4 is a perspective view of the finished slug after it has been treated to' produce the corrugations corresponding to ribs on the I Specification of Letters Patent.

' as they may be Patented'Dec. 2a, aaaa. 1914, Serial No. 345,753.

- sides ofjthehshan'k; Fig. 5 isa fragmentary plan of a pair of crimping blades and an interposed shank of thes'lug (shown in sectron) igs. 6 and 7 are vertical sections of mechanism employing such crimping blades for corrugatingthe slug,Fig. 6 showing the mechanism in position as the primary slug is inserted and Fig.- 7 showing it at the end of the operation of crimpin 8 is a vertical section the complete machine embodying the mecha nism illustrated in Figs. 5-, 6 and 7 Fig. 9

between the melting pot and matrices. Thismold is formed With'a cavity 5 for the shank of the slug and 6 for the T-head of the slug. The sides of the shank are preferably as nearly parallel and allow the slug to be conveniently ejected from the mold. The ends of the shank cavity are tapered as shown in Fig. 2, the taper being somewhat abrupt as itoleavesathehead portion of the cavity, as shown at7, and more gradual for the rest'of thelend, as shown at 8.

The slug cast by mechanism described is shown in Figs. 1, 2 and 3 and comprises the shank A and the overhanging head A. This head has printing characters, as desired. The ends of the shank have the abrupt inward taper a for a comparatively short distance adjacent to the head and then .the gradual taper a for the purpose hereinafter described.

After such slugs as shown in Fig. 3 are cast, the shanks are suitably crimped or oorrugated some distance belowthe head and below such corrugated portions the shank is cut off. ig. 5 shows a pair of corrugating blades 10 and 11' having complementary wavy or serpentine edges 9. The shank A of the slug is, placed between such blades in such position that theblades are a suitable distance be ow the head of the slug. Then,

and cut:-. ting-off the lower portion of the s ank; F

on a smaller scale of 10 is a planof the.

3 the, line of matrices.

a laterally extending cavity.

when the blades approach each other the portion of the shank between them is bent from one side to the other and corrugated, producing the ribs shown at A in Fig. 1. This corrugating action tends to force some of the metal beyond the end of the shank, and, in order that this will not extend beyond the head of the slug, the inwardly tapered portion a is provided. The corrugations are made adjacent to the lower end of'the taper a, which provides ample room for extension of the shank without its projecting beyond the head. It will be observed that such a slug as shown in Fig. 1 has, posite sides some distance below the head of the slug, liile the head and the immediately adjacent portion of the shank are left in their original cast form. Accordingl with the slug having its head accuratey cast to stand the right height above the holder, this height is preserved, notwithstanding the subsequent treatment of the slug and the finished slug thus has the desired correct height-topaper, this finished slug taking its printing pressure on the shoulder provided .by the under face of the head. 'It will be seen, therefore, that my process produces a slug much more accurately dimensioned in the critical part than where the groove is machined into the side of the slug, as experience has demonstrated that it is very difiicult to accurately machine such a groove. Moreover, my process does not disturb the original skin of the metal, wherefore the slug is stronger than if such skin were removed by machining. In the conditions of casting present in the Mergenthaler or intertype machines, it is extremely difiicult to prevent blow holes within the slug. Such blow, holes are not serious,-if the original skin of the slug 1s preserved,-but become very serious if any of the metal along the sides of machined away. My process also does away with the necessity of having a mold adapted to be opened' to release the slug, as would result if itwere attempted to cast a slug with grooves in its sides. Such openable molds reduce the accuracy ofthe resulting product-and increase the complexity and expense of the mechanism.

Mechanism for accomplishing this is shown in Figs. 6 and 7,wherein corrugating blades 10 and 11 are secured to knives 12 and 13. S cured to these knives are shown blocks 14 and 15 which have edges 16 and 17 respectively, so placed that they are adapted by springs 20 and in effect, ribs on its opv space between the shank is With my process a very simple solid mold is substituted.

of the shank to engage and center the head of the primary slug as the knives and pressing blades come to their innermost position. In the space above the crimping blades are a pair of centeringblades 18 and 19 which are designed to engage the shank of the slugimmediately below the head and above the region to be corrugated. These centering blades have a slight backward and forward movement within the respective blocks 1 1 and 15 and are pressed toward each other 21 bearing against pins 23 and which abut the ends of the blades 18 and 19. Theknife l2 and the block 14 are secured to a suitable stationary bed 2 while the corresponding knife 13 and block 15 are secured t'o 'a movable block 25. lVhen the mechanism described is in the open position, as shown in Fig. 6, there is a suilicient the centering blades 18 and 19 and the crimping blades 10 and ll for the easy insertion of the shank of the slug. At the same time the blades 18 and- 19 are positioned so that the head of the slug may rest upon and be supported by them. This is accomplished by thesprings 20 and 21 pressing these blades toward each other to the limit provided by heads 26 and 27 on the blades engaging the walls of corresponding recesses 1n the blocks 11 and 15. \Vhen the crimping blades are nearest together,

the centering blades 18 and 19 engage the shank of the slug just beneath the head, the shoulders 23 formed in the blocks 14 and 15 causing them to tightly grip the slug to preserve its exact shape for the proper distance beneath the head, at the same time squaring the upper side of the corrugated ribs A as shown in Fig. 4;. v

\Vhen the slug is in position, as shown in Fig. 6, the block 25 is moved 2-1. In this movement the spring pressed blades 18 and 19 recede into their respective blocks until their rear ends abut the outer wall of the recesses in the blocks, as shown in Fig. 7. Before these-blades reach this abutting position, the crimping blades and the knives will-have begun to act on the opposite sides of the shank, and, as the block 25 reaches its final position in its approach toward the bed 21, the knives will have sheared entirely through the shank, the crimping blades will have corrugated a strip above such knives, the centering blades will have held intact the shank above such corrugated portion, and the face of the blocks will have held the head in position. This final position is shown in Fig. 7. As a result of such operation, the lower portion of the shank trips oil and a slug of the form shown in Fig. 4 isproduced.

Figs. 8, 9 and 10 show a more complete machine for producing the crimping and shearing of the slug shank just described. In this complete machine the crimping toward the bed 7 I the blocks 14 and operation.- The employ mechanism 835 478, of Harry screws passing through slots 31 in the crimp- 1 mg blades.

This construction enables the knives tabs the crimping blades as the knives wear. in

blades at their edge opposite the crimping edge abut the wall of the recess in the blocks 14 and 15, which, with the knives, are secured, as explained, to the bed 24 or the movable-slide 25. Suitable set screws 34 and 35 screwing through the' bed and block respectively adjust the knives and parts carried thereby.

it is convenient to make the bed 24 as a portion of the main form of the machine and to mount the slide 25 thereon as shown in Fig. 8. Any suitable means may be employed to force the slidetoward the 'co6pcrating member. F or this purpose I may shown in application No. C. G'ammeter for moving suitable dies for producing another operation on the shank of line slugs' The said Gammeter application should be referred to for claims on whatever is common to thatapplication and this. As stated,- one of the common features is the mechanism for operating the slide, which will now be described.

The slide 25' is shown as having its rear edge inclined'(Fig. 9) and provided with a downwardly projecting rib 40. Behind this slide is a wedge 41 which has a diagonal rib 4-2 extending in front of the rib 40. Accordingly, thieslide is carried to the wedge for ainovement toward or from the stationary dies whilethe wedge may move longitudinally of the slide and thus force it laterally.

To move the wedge longitudinally it is provided with a rack 45 with which meshes a segment 46 which is pivoted at 4:7 and formed beyond'the pivot into an operating lever 48. Set screws '50 and 51 limit the movement of the wedge in each direction. To hold the-slug firmly down between the dies during the operation a rocking frame 55 is provided which has a roller 56 adapted to rest on the face of the slugand an operating handle 57. A suitable set screw 58 limits the downward movement of the roller so that slug may be held accurately pressed down upon the centering dies.

in operating the machine shown in Figs. 8, 9 and 10 the cast "5" slug is inserted by hand between the pressing devices and the lever 57 is shoved over to press the slug down in position and the lever 48 is drawn l'orwardly to shift the wedge to force the movable die and knife against the shank of the shig. thus crimping the shank and cutting oil the portion below the crimped ribs;

By using a hard rubber roller 56 I can hold the slug firmly in position during thls operation without injuring the face of the charadjusted relativelyinward of acters. The i oller to present different unduly worn].

Having thus described my invention, what I claim is': J 1. The process of making slugs consisting of forming the slug in a T-shape and submitting produce protuberances on the opposite sides thereof.

2. A process of making slugs adapted to stand a short height-to-paper consisting of originally forming the slug in a T-shape and thereafter corrugating the same to produce protuberances on the opposite sides of the shank and removing the shank below the corrugations.

3. The process of forming printing slugs consisting of casting the slug in a T-shape and by pressure oppositely bending the shank thereof some distance head.

l. The

gradually works around portions so that it is not process of forming printing slugs consisting of casting the slug in a T-shape, corrugating the shank thereof some distance 'below the T-head and removing the shank below the corrugations.

5. The process of forming printing slugs consisting of casting the slug in a T-shape and thereafter submitting the shank to pressure on opposite sides to bend laterally a strip of the shank parallelwith and some distance below the head.

6. The process of forming printing slugs consisting of casting the slug in a T-shape and thereafter submitting the shank to pressure on opposite sides to bend laterally a strip of the shank parallel with and some distance below the head and at the same time removing the shank below the laterally bent portions.

7. The process of making printing slugs consisting of forming a slug with a shank and corrugating the shank to produce lateral projections.

8. The process of making printing slugs consisting of forming a slug with a shank and corrugating the shank to produce lateral projections and removing the shank below the projections.

9. The process of making a slug having the effect of one cast with grooves in its the shank to pressure adapted to below the T- v consisting of casting the slugwith an over- 2.30

hanging head and a shank, thereafter pressing inwardly aga nst the side ot the shank at separated spots in a row some dis-' tance below the head to cause the shank'to be indented and protuberances formed op: posite the indentations.

12. T heprocess of making printing slugs Y consisting of casting the slug in a T-shape with a smootlmsided shank and thereafter pressing inwardly against each side of the shank at separated. spots some distance below the head, such spots 'on one side of the shank being out of registration With' those on the other, whereby material of the shank is forced outwardly in opposite. di-

rections to produce. projections alternately on opposite sides of the shank.

' 13. The process of making printing slugs consisting. of casting the slug with an overhanging head and a shank, and'after the slug is removed from its mold submitting the shank to pressure from each side at separated spots in a row some distance below the head and ,parallel therewith, the spots on opposite sides of theshank being out.of

shank is indented alternately from. opposite sides and resulting protuberanccs formed.

registration irith each other, whereby the v I 14. The processpf making printing slugs consisting of casting the slug with a T-head and a smooth-sided shank ,andafter the slug" v is. removed from its mold" submitting the shank to pressure from eachside at sepa-. rated locat ons in a'rowsome distance below the head and parallel therewith, and shearing ofi'the p ortion of the shank below the partspressed, the parts pressed'on opposite sides of the shank being respectively out of I registration with each other, and said pressure being suflicient to indent the sides of the shank and press protuberances out 

